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1 results

  • North-south asynchrony and long-term variations of sunspot latitudes

  • Nadezhda V. Zolotova, D. I. Ponyavin
  • Journal:
    Proceedings of the International Astronomical Union / Volume 4 / Issue S259 / November 2008
    Published online by Cambridge University Press:
    01 November 2008, pp. 237-238
    Print publication:
    November 2008
    • Article
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  • The long-term records of sunspot area available separately for Northern and Southern Hemispheres have been investigated by means of cross-recurrence technique. Phase component of the north-south asymmetry was extracted. This measure demonstrates long-period systematic variations with the sign change of hemispheric leading in 1930s and 1960s. Moreover phase north-south asynchrony anticorrelates with the so called magnetic equator, which was defined as difference of the mean sunspot latitudes between two hemispheres. Relationships of the phase north-south asynchrony, magnetic equator and butterfly diagrams are presented and discussed.